Effects of moisture on the life of power plant cables: Part 1, Medium-voltage cables; Part 2, Low-voltage cables. Final report
- Ogden Environmental and Energy Services Co., Inc., Blue Bell, PA (United States)
- Strategic Technology and Resources, Winchester, MA (United States)
Motivated by the concern that in-service moisture may decrease the useful life of medium and low-voltage electrical cables in power plants, EPRI investigators surveyed plant operators, examined cable failure experience, and assessed the need to develop unproved life prediction techniques. The survey revealed that only 34 medium-voltage cable failures have occurred in the more than 1000 plant-years of experience represented. In addition, moisture effects such as voltage-induced water-freeing have not been the primary cause of the failures but are one contributor among several, including manufacturing defects, installation damage, and inadvertent damage to cable by field equipment the study concludes that medium-voltage cables are rehable and there is insufficient interest on the part of surveyed utilities to warrant further R&D on cable condition evaluation techniques at this time. In addition, moisture-related degradation is not a significant concern for low-voltage cables. This two-part report discusses,the limitations of existing cable field testing techniques and highlights measures for maximizing the useful life of medium- and low-voltage power plant cables.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); Ogden Environmental and Energy Services Co., Inc., Blue Bell, PA (United States); Strategic Technology and Resources, Winchester, MA (United States)
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 10187861
- Report Number(s):
- EPRI-TR-103834-Pt.1-2; ON: UN95001131
- Resource Relation:
- Other Information: PBD: Aug 1994
- Country of Publication:
- United States
- Language:
- English
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